Rotary blower and exhauster.



PATENTED MAY 30, 1905.

I. W. GREEN. ROTARY BLOWER AND EXEAERTE APPLIUATION FILED JAN- 7, 1905.

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No. 791,147. PATENTEDM'AY so, 1905. T. w. GREEN ROTARY BLOWER ANDEXHAUST-ER.

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$11 mutter qxntnoomm UNITED STATES Patented May 30, 1.905

PATENT OFF CE:

ROTARY BLOWER AND EXHAUSTER.

SPECIFICATION forming part of Letters Patent No. 791,147, dated May 30,1905.

' Application filed January '7, 1905- Serial No. 240,129.

To all whom it may concern:

Be it known that I, THOMAS W. GREEN, a

' citizen of the United States, residing at Philadelphia, in the countyof Philadelphia and State of Pennsylvania, have invented new and usefulImprovements in Rotary Blowers and Exhausters, of which the following isa specification.

This invention relates to improvements in rotary blowers,gas-exhausters, &c., and has particular reference to a device whereinthe lock is formed by three coacting rotary looking parts.

The object of the present invention is to increase the volume of air orother fluid delivered therefrom and to provide a-steady even flowtherefrom when the device is operated.

A further object of the invention is to provide a device in which theimpellers may be easily, quickly, and accurately finished and assembledand in which the maximum amount of air-space may be obtained.

To these ends the invention consists in the novel construction,arrangement, and combination of the several parts of the device, ashereinafter described, illustrated in the drawings, and moreparticularly pointed out in the claims hereunto appended.

In the drawings, Figure 1 is a transverse vertical section of thedevice, showing the locking parts in cross-section and their relation toone another and to the blower-casing. Fig. 2 is a vertical longitudinalsection of the device. Fig. 3 is a perspective view of one of the sidelocking members; and Fig. 1 is a perspective view, partly broken away,of the central locking member, showing the construction thereof. Fig. 5is a view of one of the heads of the central locking member.

Referring to the drawings, the numeral 1 indicates the shell or casingof the device, which is circular in cross-section, 2 the intake, and 3the outlet.

The numerals 4 4 indicate circular or segmental offsets in the sides ofsaid casing, ex-

tending the length thereof and are for a purpose hereinafter stated.

The numerals 5 5 indicate the side locking members, each of whichconsists of two circular heads 6 6, adapted to set into andrevolve incircular seats 7 7 in opposite ends of the casing and are connected by alongitudinal web or crescent-shape portion 8. The outer surface 9 ofthis crescentshape portion has the same curve as the heads 66, while theinner surface 10 is made on an are greater than the outer surface 9 fora purpose hereinafter stated. This crescent-shaped web may be eitherhollow or solid and may be cast integral with the heads 6 6 orseparately'and afterward secured thereto in any suitable manner. Eachhead 6 6 is provided with a suit:

able journal 11, which passes through a suitable opening in the end ofthe casing, as is evident. On one of the journals 11 of each of the sidelocking members 5 5 is a suitable gear-wheel adapted to mesh with acorresponding gear-wheel on the main driving-shaft for the purpose ofgiving rotation to the side looking members, as will be evident.

The numeral 14 indicates the main drivingshaft mounted in the casingthrough the inlet and outlet openings in the end walls thereof andjournaled in suitable bearings in the housings 15 15 at the respectiveends of said casing. Theshaft 14 carries the rotary central lockingmember 16 of the device, revolving the same, and also the two sidelocking members with which it is geared. The central locking member 16consists of the heads 16' 16 having spiral or other suitable channels 1616* therein, an imperfect cylinder or curved web 18 connecting saidheads and of the same diameter as said heads and coincident therewith, asuitable blade-holding arm or bracket 19, and a blade 20, secured in aslot or socket 21 in said arm, said blade be ing of such dimensions asto sweep the interior surface of the casing, including the innersurfaces 10 10 of the side locking'members 5 5 during the revolution ofthe central look ing member and the eoacting side members. The member 16may be cast integral or made in parts and afterward secured together,and the member itself may be cast integral with the main driving-shaft,if so desired.

In assembling the machine the several look- The operation of the deviceis as follows:

Power being applied to the shaft 14, the three locking members 5 5 and16 will each revolve in the direction of the arrows placed thereon. Byreason of each of the side locking members5 5 being geared with thecentral revolving locking member 16 the edge 12 of one of the sidelocking members 5 will be exactly at the edge 12 of the inner surface ofthe casing when the blade 20 reaches that point in its revolution andpermit said blade to enter upon and sweep the inner surface 10 of thesaid side locking member, and when the blade 20 reaches the edge 12 ofthe opposite side of the inner surface of the casing the edge 13 of thecorresponding crescentshaped side locking member will have reached thatpoint, thus permitting said blade to enter upon and sweep the innersurface 10 of this side locking member, the blade 20 passing therefromat 12 when this edge is at the point 13 of this side of the outercasing. The outer surface 9 of each of the side locking members 5 5 isadapted to contact with and roll against the imperfect cylinder orcurved web portion 18 of the locking member 16 during the operation ofthe device to form a lock, so that there is maintained at all times aperfect lock between the inlet and outlet openings of the device.

When this device is operated, air will be drawn into the intake 2 andthrough the channel or passage 16 of the head 16 of the central rotarymember and out into the interior of the casing to the rear of the blade20 and forced by said blade during its travel out through the channel orpassage 16 in the head 16 of said central rotary member into the outlet8, as is evident. It'will be apparent that modifications and alterationsin the construction of the device may be made without departing from thespirit of my invention, and I therefore do not confine myself to thestructure herein shown.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

1. In adevice of the character described, the combination with tworotary locking members, of a third rotary locking member provided with asingle locking-blade, said blade and third locking member being arrangedto coact with said other locking members to form a lock.

2. In adeviee of the character described, the combination with tworotary crescent-shape locking members, of a third rotary locking memberhavinga single blade adapted to sweep the inner surfaces of saidcrescent-shape locking members, all of said locking members adapted tocoact to form a lock.

3. Inadevice of the character described, the combination with twocrescent-shape rotary locking members, of a third rotary member locatedbetween said crescent-shape locking members and adapted to coacttherewith, said third member being provided with a single blade adaptedto sweep the inner surfaces of .said crescent-shape rotary lockingmembers,

and an inlet-opening through one end of the casing and the abutting endof the third r0- tary locking member, and an outlet-passage through theopposite end of said third rotary locking member and the adjacent end ofthe casing.

4. In adevice ofthe character described, the combination with two rotarycrescent-shape locking members, of a third rotary locking member locatedbetween said crescent-shape locking members said third rotary lockingmember having a curved web portion, and a single blade adapted to sweepthe inner surfaces of said crescent-shape locking members, and aninlet-passage extending through one end of the casing and the abuttingend of the third rotary locking member to one side of said blade, and anoutlet-passage extending from the opposite side of said blade throughthe opposite end of said third rotary locking member and the adjacentend of the casing.

5. In adevice of the character described, the combination with tworotary crescent-shape locking members, of a third rotary locking memberlocated between said crescent-shape locking members, said third rotarylocking member having a curved web portion, and a single blade adaptedto sweep the inner surfaces of said crescent-shape locking members, saidcurved web portion adapted to engage the outer surfaces of saidcrescent-shape locking members during the operation of said device, andan inlet-opening in one end of said third rotary locking member at oneside of said blade, and an outlet-opening in the opposite end of saidthird rotary locking member on the opposite side of said blade.

6. In adevice of the character described, the combination with tworotary crescent-shape locking members, each member having aconvex and aconcave locking-surface, of a third locking member located intermediatesaid crescent-shape members and having an imperfect cylinder or curvedweb-locking portion and a single locking blade, the said curvedweblocking portion being adapted to contact with the convex surfaces ofthe crescent-shape locking members and the blade with the concavesurfaces thereof, and openings in said third locking member on each sideof said blade for the entrance and exit of the air.

In testimony whereof I aifix my signature in presence of two subscribingwitnesses.

THOMAS \V. GREEN.

Witnesses:

TI-Ios. D. MowLDs, LIDA (J. ILKO.

